matrix := [ [0,5,0,0,0,0,0,0], [0,0,6,0,0,0,0,0], [5,0,0,0,0,0,0,0], [0,0,0,0,6,0,0,0], [0,0,0,0,0,0,6,0], [0,0,0,0,0,0,0,6], [0,0,0,6,0,0,0,0], [3,8,8,10,10,5,10,5] ]*Z(11);